Husband moved out in December. Have begun divorce proceedings. He has admitted to unreasonable behaviour after I caught him chasing another woman. Since then he has joined a dating site, been out with 4 or 5 women and now got a new girlfriend with a 15 year old son. He has been with this woman for about 3 months. He has booked a holiday without consulting either me or my children and is expecting my children to go with him, new gf and her son. Eldest dd (17) has said no. Youngest dc (15, vulnerable) is wavering. I don't think it's appropriate for all sorts of reasons not least she barely knows these people. Likely to be full of tension. DH can be aggressive but will have to try and keep both my child and other woman's child happy. Recipe for disaster but also no reason to do something so extreme so quickly. Have said I will support dh to maintain positive relationship with children but he must communicate with me (and them!) before organising things. In this case I think he's got it wrong. What do you think? Where do I stand legally? I have contacted my solicitor to ask too.